131501321 has 8 divisors (see below), whose sum is σ = 153123264. Its totient is φ = 110588400.

The previous prime is 131501303. The next prime is 131501333. The reversal of 131501321 is 123105131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131501321 - 2¹⁴ = 131484937 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 131501321.

It is not an unprimeable number, because it can be changed into a prime (131501221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176855 + ... + 177596.

It is an arithmetic number, because the mean of its divisors is an integer number (19140408).

Almost surely, 2^131501321 is an apocalyptic number.

It is an amenable number.

131501321 is a deficient number, since it is larger than the sum of its proper divisors (21621943).

131501321 is an equidigital number, since it uses as much as digits as its factorization.

131501321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354511.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 131501321 is about 11467.4025393722. The cubic root of 131501321 is about 508.5223420643.

Adding to 131501321 its reverse (123105131), we get a palindrome (254606452).

The spelling of 131501321 in words is "one hundred thirty-one million, five hundred one thousand, three hundred twenty-one".